<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <input type="text" v-model.trim="msg">
    {{msg}}
    <hr>
    <input type="text" v-model.lazy="msg2">
    {{ msg2 }}
    <hr>
    <input type="text" v-model.number="msg3">
    {{ msg3 }}
  </div>
  <script src="./vue.js"></script>
  <script>
    const vm = new Vue({
      el: '#app',
      data: {
        msg: '',
        msg2: '',
        msg3: ''
      }
    })
  </script>
</body>
</html>